User's Manual

R400A
LECTROSONICS, INC.
18
Troubleshooting
Symptom Solution
LCD display not active External power supply disconnected or inadequate.
Main power supply fuse tripped. Turn the receiver off, remove the
cause of the overload and turn the receiver back on.
Wrong polarity power source. The power input jack requires
POSITIVE to be on the center pin.
LCD Message Appears:
Fatal Error DSP Failed to Initialize This indicates an internal error. Please contact the factory for
assistance.
Warning - Supply Voltage Out of Range External power supply voltage is too high or too low. Check external
power supply.
Warning Check Freq, May Be Mistuned If this message appears when the transmitter is turned off, it means
interference was detected on the channel. The solution is to find a
new frequency on which to operate.
If this message appears when the transmitter is on, it usually means
that the transmitter’s tuning does not exactly match the receiver’s.
Double-check that the transmitter and receiver are on the same
channel. If the message persists, it may mean that the transmitter or
the receiver is out of alignment. Contact the factory for assistance.
PILOT indicator is solid “P”, but no sound Audio output cable bad or disconnected, or connected to the wrong
audio output jack.
Audio Output level set too low or wrong output used. Ensure the
correct audio output is being used, then use the built-in test tone to
verify levels.
PILOT “P” keeps flashing when transmitter power switch is turned on
Pilot tone detection can take several seconds. Turn on the transmitter
power (and the audio switch on some models) and wait 3 to 5 seconds
for the “P” to indicate steadily.
Transmitter and receiver not on same frequency.
Receiver compatibility mode does not match the transmitter in use.
Noise on audio and Pilot indicator is “b” The pilot tone bypass has been activated. Set PilotBP to NORMAL.
Pilot indicator not present but audio is being received
Receiver is set to a compatibility mode that doesn’t use pilot tone.
Check that receiver compatibility mode matches the transmitter in use
as any sufficiently strong signal can unsquelch the receiver in this
mode, compatible or not.
Note: In 400 Series, 200 Series, IFB and Mode 6 compatibility modes, the PILOT indicator on the front panel shows as
a solid “P” to indicate that the audio has been turned on at the transmitter, and that the audio output on the receiver is
enabled. When the “P” is on, the audio is enabled. If the “P” is flashing the pilot tone is not detected and the audio will
be muted (squelched). In the other compatibility modes, no pilot tone is used and the “P” is never displayed. Audio is
present whenever the receiver detects a sufficiently strong signal.
Note: In 400 Series, 200 Series, IFB and Mode 6 compatibility modes, activating the “pilot bypass” function causes a
lowercase “b” to appear in the pilot indicator position on the main window and forcibly unsquelches the audio.